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A Wireless Sensor Network (WSN) is typically depicted as a distributed resource constrained platform for supporting novel pervasive applications. A possible approach is to develop applications over WSNs by resorting to mobile agent frameworks that are aimed to minimize resource costs and memory allocation. In this context, network topology is a major issue to be considered for resource optimization:...
A wireless sensor network is comprised of a large number of battery-limited sensor nodes. In a predefined period, sensor nodes get data and transmit data to BS by a fixed construction. In this paper, we introduce a scheme for selecting the construction to prolong the lifetime of wireless sensor network based on energy balance. Further, an optimal math model is proposed for calculating the energy cost...
In this paper, wireless sensor network (WSN) topology optimization for dependability is considered, where two metrics “reliability” and “integrity” for WSN are defined. First, static topology optimization problem for reliability, integrity and joint optimization of them are investigated and some trade-off relationships are clarified. Then, dynamic topology optimization problem is proposed, where some...
Saving energy in Wireless Sensor Networks is essential to extend the lifetime of in-field deployments. Previous research has shown that communication is generally the most energy consuming task and needs to be reduced in order to build resource-efficient long-term applications. The communication demand for retrieving query results from deep within the sensor network is typically high. As a result,...
Finding an optimal key assignment (subject to given constraints) for a key predistribution scheme in wireless sensor networks is a difficult task. Hence, most of the practical schemes are based on probabilistic key assignment, which leads to sub-optimal schemes requiring key storage linear in the total number of nodes. A graph theoretic framework is introduced to study the fundamental tradeoffs between...
Topology control is an effective method to improve energy-efficiency and increase the capacity in Wireless Sensor Networks (WSNs). To fully characterize WSNs with lossy links, we propose a novel probabilistic network model. Under this model, we meter the network quality using network reachability defined as the minimal of the upper limit of the end-to-end delivery ratio between any pair of nodes in...
In this paper we focus on the energy optimization based on the incremental exploration of the network. We perform one-hop neighborhood exploration of the neighborhood but the work can be generalized to 2-hop, 3-hop, . . . up to the diameter of the network, which is the minimum number of hops between any two nodes in the network. We propose three distributed algorithms for self-adjusting the transmission...
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